US2600715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic brake actuator for helicopter rotors
Assignee: Bell Aircraft Corp
•
Filing: 1950-01-03
•
Granted: 1952-06-17
•
Expires: 1970-01-03
Abstract
No abstract record available.
Inventors
- 👤 John W Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:52
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/04; B64C27/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1999737A
Cited
US2115174A
Cited
US2141091A
Cited
US2197126A
Cited
GB549333A
Cited
US2344299A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |